Parsing state of the art and ANTLR 4 demo using intellij plugin

Description

Quick discussion of attempts to increase top-down parsing strength and a demo of ANTLR 4 using the Intellij plugin. The demo language is Valgol, derived from "Valley girl" speak from 1980s. Hilarious. Speed comparison of ANTLR to many other tools when parsing Java.

Computer Language Design and Implementation meetup March 6, 2014 Latest and greatest parsing stuff Terence Parr University of San Francisco

Believe it or not... ● I think I have built my last parser generator ● ``Why program by hand in 5 days what you can spend 5 years of your life automating?’’ ^ 2

The great struggle ● Top-down (LL), bottom-up (LR,GLR) have duked it out for a long time ● LL(k) much weaker than GLR as GLR can take any grammar ● LL is O(n), GLR is “O(n^3)” ● Some worked on increasing LL strength ● Others worked on optimizing GLR for speed

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